Library / Mathematics / First notions of logic (preparatory to the study of geometry) / Braille
First notions of logic (preparatory to the study of geometry) ⠃⠗⠋ braille edition
Grade 1 — uncontracted, letter-for-letter. Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 2 instead.
Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt
67,011 braille cells · 68 embossed pages at 40×25 · 366 unrepresentable characters omitted
⠠⠁⠀⠠⠑⠧⠑⠗⠽⠀⠠⠃⠀⠊⠎⠀⠠⠭⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠑⠀⠠⠝⠕⠀⠀⠀⠀⠠⠁⠀ ⠊⠎⠀⠠⠭⠀⠶⠠⠉⠕⠶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠕⠀⠠⠎⠕⠍⠑⠀⠀ ⠠⠁⠀⠊⠎⠀⠝⠕⠞⠀⠠⠭⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠑⠀⠠⠝⠕⠀⠀⠀⠀⠠⠁⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠕⠀⠠⠎⠕⠍⠑⠀⠀⠠⠁⠀⠊⠎⠀⠝⠕⠞⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠞⠓⠊⠗⠙⠀⠠⠋⠊⠛⠥⠗⠑⠲⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀ ⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠑⠀⠠⠝⠕⠀⠀⠀⠀ ⠠⠭⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀⠠⠁⠀ ⠶⠠⠉⠕⠶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀ ⠠⠁⠀⠶⠠⠉⠕⠶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀ ⠠⠊⠀⠠⠎⠕⠍⠑⠀⠀⠠⠁⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠕⠀⠠⠎⠕⠍⠑⠀⠀⠠⠁⠀⠊⠎⠀⠝⠕⠞⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠊⠀ ⠠⠎⠕⠍⠑⠀⠀⠠⠭⠀⠊⠎⠀⠠⠃⠀⠶⠠⠉⠕⠶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠕⠀⠠⠎⠕⠍⠑⠀⠀⠠⠭⠀⠊⠎⠀⠝⠕⠞⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀⠠⠑⠧⠑⠗⠽ ⠀⠠⠭⠀⠊⠎⠀⠠⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀ ⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀⠠⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠊⠀⠠⠎⠕⠍⠑⠀⠀⠠⠁⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠠⠕⠀⠠⠎⠕⠍⠑⠀⠀⠠⠁⠀⠊⠎⠀⠝⠕⠞⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀ ⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
These are the same pages the .brf download embosses — form-feed breaks and all. BRF opens in braille software (Duxbury, BrailleBlaster), on embossers, and on refreshable displays.